“This is a historic day for the BBC, as we announce the biggest expansion of the World Service since the 1940s,” said BBC director general Tony Hall.

“The BBC World Service is a jewel in the crown – for the BBC and for Britain.

“As we move towards our centenary, my vision is of a confident, outward-looking BBC which brings the best of our independent, impartial journalism and world-class entertainment to half a billion people around the world.

“Today is a key step towards that aim.” The plans include the expansion of digital services to offer more mobile and video content and a greater social media presence.